Drilling mechanism



Patented Dec. 20, 1927.

UNITED STATES PATENTOFFICE- n'nivaY mantra, or chasm/tour, NEW nAMrs mE, ,ASSIGNOR 'ro SULLIVAN MA- CHINERY COMPANY, A CORPORATION or MASSACHUSETTS.

. DRILLING MECHANISM. v

Application filed February 29 1924, Serial No.' 695,876.

My invention relates to drilling mecha nisms. 1

It'lias for'itsobject to provide antimproved drilling mechanism. Another object is to provide an improved hole cleansing means. A further object is to provide improvedhole cleansing control means in a drilling mechanism employing a'fluid distributing valve. Another object is to provide improved movement of the fluid distributingvalve tocleanse the hole being drilled. A further object is to provide improved manually operable meansfor holding the fluid distribution valveat one end of its stroke in order to direct live pressure fluid to only one end of the hammer piston from which fluid might flow through ahollow steel and thereby cleanse the hole. Another object is to provide improved manually operable cam means for accomplishing the above function. In the accompanying drawings I have shown for purposes of illustration oneform which my invention may assume in practlce' In thesedrawings,

through "my improved drilling mechanism, parts of which are shown in elevation.

Fig. 2'isa fragmentary plan view of. the fluid distributing valve mechanism.

In the illustrative form of my invention I have shown the same embodied within a drilling mechanism comprising a usual cylinder 1 having a piston 2 reciprocably 5 mounted therein and projecting forwardly from which is a striking bar 3 having flutes l adapted to cooperate with lugs in a chuck nut 5. Jlny suitable ratchet and rifle bar mechanism, not shownymay be carried in the rear head 7 to cause rotation of the pisten 2 and also of a chuck sleeve 8 which carries the chuck nut 5, this sleeVe being rotatably mounted within a chuck housing 9 carried on the front end ofthe cylinder.

Also carried by the rear head are usual hole cleansing fluid conducting tubeslO one of which terminates within the hollow steel 11 carried in the sleeve 8. Live actuating fluid is controlled by a usual manually operable valve 12 carried in. the rear head 7 and adapted to control the flow oflive pressure fluid to an automatic fluid distributing valve 13 reciprocably mounted within a valve housing 14 formed on-the side of the cylinder 1 and adapted to control flow of live fluid means for controlling the Fig. 1 is a vertical longitudinal section is an enlarged'head-23 from which a stem 24 to, and eXhaust fluid from, the cylinder through passages 15. The valve structure is,

held together by'side rods 16 connected at opposite ends by a spring '17 which holds valve buffers 18 in position. I

ltis sometimesdesired to supply supplemental ,hole oleansingfluidto the hollow steel '11 and the same'is accomplished by providing suitable means for holding the piston 2 in its rearward position, in which,

case live pressure fluid in -the front end of thecylinder'will flow along the flutes land through the clearance between said flutes and the nut 5 to the hollow steel 11. To hold the piston in such position, I have provided a novel nieans for throwing the'valve'13 to its rearward position in which case live pressure 7 fluid will be continuously admitted to the, front endof the cylinder. This improved throwing means comprises a fluted stem 20 longitudinally movable in abore 21 which extends rearwardly from an. enlarged bore 7 22 both of which are formed within one of enlarged bore 22 and carried by thestem 20 the buffer members18. Disposed within the projects outwardlythrough a hole 25 formed. 1n 'oneiofthe cross springs 17. {It-is to be noted that the head- 23, is also fluted so that the rear end of the valve 13 is vented to the atmosphere. Suitable means are provided for shifting the valve as by forcing the stem 24 inwardly and which comprises a graspinglever 26 pivotally mounted upon one of the side rods 16 which is slightly longerthan the other one which grasping lever carries on its inner end a cam member 27 having an inclined camsurface 28 adapted when moved upwardly to engage the stem 24 and thereby thrust the same inwardly to holdthe valve 13. in inoperative position. 'lt will herein be noted that when the valve 13 is held in its inoperative position as shown the central spool of. the valve and through the right hand distributing passage 15 to the in Fig. 1 pressure fluid flows from the fluid supply passage past the right hand side of loop forward end of the cylinder thus causing an extremely simple means foractuating the a valve and one Which requires very little eX- ertion on the part 01' the operator.

Wli-ileyI have in this application specifi= cally described one i orm Which-- my invention may assume in practice, it will be understood that this form of the same iss'liovv'n for purposes of illustration and that the invention may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

that I claim as new and desire to secure by Letters Patent is: v

1. The combination with a drilling mechanisinhaving a valve mechanism including an automatic fluid distributing valve, side rods for holding means including control means therefor comprising a member pivotally connected to one of said side'rods and provided with means for controlling said valve.

2. The combination With a drilling mechanism liavingavalve mechanism including an automatic fluid. distributing valve-and side rods for holding parts of said valve mechanism inasseinbled relatiomof hole cleansing means including control means comprising a lever pivotally connected to one of said side rods and having a cam portion formed thereon for actuating said valve.

3. The combination with a drillingmechanism having an automatic fluid distributing valve, side rods for holding nism inassembled relation, and a stem engageable with said valve for varying the operation thereof, of holecleansing means parts of said valve mechanism 111 assembled relation, of hole cleansing a valve mechanism including.

parts ofsaid valve mecha-' including control means comprising amanually operable cam member pivotally c0nnected to one of said side rods and in slidable thereof, of hole cleansing means including;

controlmeans comprising, a cam member pivoted mom of said side rodsand movable transversely of said valve in engagement with said stem for actuatingv sald valve.

The combinationwith a drillingimechanism having a valve mechanism includingan automat c fluiddistribut ng valve, side rods for holding parts of said valve mechanism in assembled relation and a stem engageable with said valve -for varying. the operation thereof, of hole cleansing means including control means comprising a transversely movable cam member side rods for actuating said stem, and alatpivoted on one of said erally projecting operating element for said cam member.

6. The combination with a drilling mechanism having. an automatic reciprocable fluid distributing. valve, including control means for said valve comprising acam lever pivoted on an axis parallel. to the line of reciprocation of said valve, said lever being swingable in a plane extending transversely of the longitudinal axis of said valveand having a'camsurface thereon for actuating said valve:

In testimony whereof afli-x my signature.

HENRY TARDI-FF;

of hole cleansing means 

